Measles in the Weser-Ems region of Lower Saxony, Germany, 2001-2002
Weekly counts of new measles cases for the 17 administrative
districts (NUTS-3 level) of the “Weser-Ems” region of Lower
Saxony, Germany, during 2001 and 2002, as reported to the Robert Koch
institute according to the Infection Protection Act
data("measlesWeserEms") is a corrected version of
data("measles.weser") (see Format section below).
These data are illustrated and analyzed in Meyer et al. (2017, Section 5),
data("measles.weser") is an object of the old
data("measlesWeserEms") is of the new class
Furthermore, the following updates have been applied for
it includes the two districts “SK Delmenhorst” (03401) and “SK Wilhemshaven” (03405) with zero counts, which are ignored in
it corrects the time lag error for year 2002 caused by a redundant pseudo-week “0” with 0 counts only (the row
it has one more case attributed to “LK Oldenburg” (03458) during 2001/W17, i.e., 2 cases instead of 1. This reflects the official data as of “Jahrbuch 2005”, whereas
data("measles.weser")is as of “Jahrbuch 2004”.
it contains a map of the region (as a
"SpatialPolygonsDataFrame") with the following variables:
district area in m^2.
number of inhabitants (as of 31/12/2003).
proportion with a vaccination card among screened abecedarians (2004).
proportion with at least one vaccination against measles among abecedarians presenting a vaccination card (2004).
proportion of doubly vaccinated abecedarians among the ones presenting their vaccination card at school entry in the year 2004.
it uses the correct format for the official district keys, i.e., 5 digits (initial 0).
its attached neighbourhood matrix is more general: a distance matrix (neighbourhood orders) instead of just an adjacency indicator matrix (special case
nbOrder == 1).
population fractions represent data as of 31/12/2003 (LSN, 2004, document “A I 2 - hj 2 / 2003”). There are only minor differences to the ones used for
Measles counts were obtained from the public SurvStat database of the Robert Koch institute: https://survstat.rki.de/.
A shapefile of Germany's districts as of 01/01/2009 was obtained from
the German Federal Agency for Cartography and Geodesy
The map of the 17 districts of the “Weser-Ems” region
measlesWeserEms@map) is a simplified subset of this
shapefile using a 30% reduction via the Douglas-Peucker reduction method
as implemented at https://MapShaper.org.
Population numbers were obtained from the Federal Statistical Office of Lower Saxony (LSN).
Vaccination coverage was obtained from the public health department of Lower Saxony (NLGA, “Impfreport”).
Meyer, S., Held, L. and Höhle, M. (2017): Spatio-temporal analysis of epidemic phenomena using the R package surveillance. Journal of Statistical Software, 77 (11), 1-55. doi:10.18637/jss.v077.i11